<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="vue3.js"></script>

</head>

<div id="app">{{ message }}</div>

<script>
    const { createApp } = Vue

    createApp({
        data() {
            return {
                message: 'Hello Vue!'
            }
        }
    }).mount('#app')
</script>
</html>